Piano-stringing.



W. G. SCHEINPFLUG.

PIANO STRINGING.

APPLICATION FILED JULY 1, 1915.

Patented July 18, 1916.

//1/ my TOR l f d/zelm 6 ja/zezzgafl z BY AITORNEYS WITNESSES UNITEDSTATES PATENT OFFICE.

WILHELM G. SCHEINPFLUG, OF NEW YORK. N. Y.

PIANO-STRINGING.

lVoodhaven, borough of Queens, in the county of Queens and State of NewYork, have invented a new and Improved Piano- Stringing, of which thefollowing is a full, clear, and exact description.

The invention relates to pianos and similar stringed musicalinstruments, and its object is to provide certain new and usefulin'iprovements in said instruments whereby the strings especially thosein the treble re-' main in tune for a long period and when soundedproduce fiageolet tones or barmonics.

In order to produce the desired result, use is made of a treble stringstretched over spaced bridges and of a length which is a multiple of thelength of the ordinary string which it supersedes, and an auxiliarybridge located intermediate the said regular bridges and lightlytouching the string at any one of its aliquot parts.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a face view of the strings of a piano stretched over thestring plate and provided with an auxiliary bridge for the treblestrings; Fig. 2 is a cross section of a piano provided with theimprovement; and F ig. 3 is a similar view of a modified form of theimprovement.

The treble strings A of the;piano are of a length which is a multiple ofthe length of the corresponding ordinary treble strings now generallyemployed, and the said treble strings are stretched over the saidbridges B and C on the string plate 1. An auxiliary bridge D lightlytouches the strings A at aliquot parts of the strings. The strings A aswell as the remaining bass strings E are sounded by the hammers F of thepiano action in the usual manner. The treble strings A are preferablysounded between the bridge B and the auxiliary bridge D.

Specification of Letters Patent.

Patented J uly 18, 1916.

Application filed July 1, 1915. Serial No. 37,520.

It will be noticed that when a treble string A is sounded by its hammerF the entire string is caused to vibrate but owing to the interpositionof the bridge D flageolet tones or harmonics are produced.

Although the improvement is shown in Figs. 1 and 2 in permanentengagement with,

the treble strings A, it is evident that the auxiliary bridge D may bemade movable, as shown in Fig. 3, so as to move it completely out ofengagement with the strings whenever it is desired to do so. For thepurpose mentioned the bridge D is mounted to slide in suitable bearingsD and is connected at its ends with levers G secured to a shaft Hprovided with an arm I connected by a link J with a supplementary pedalK under the control of the player. Normally the bridge D is out of engaement with the strings A but when the ped al K- is pressed the bridge Dis moved lightly into engagement with the strings A.

Having thus described my invention, I claim as new and desire to secureby Letters Patent: g

1. A piano provided with a string plate, stringscarried by the saidplate, the treble strings each being of a length which is a multiple ofan ordinary string, bridges'carried by the frame and over which thestrings are stretched, and an auxiliary bridge carried by the plateintermediate of the first named bridges and over which the treblestrings pass and engage at aliquot parts of their length.

2. A piano provided with a string plate, strings carried by the saidplate, the treble strings being each of a length which is a multipleof-an ordinary string, bridges car,- ried by the plate and over whichthe strings are stretched, an auxiliary bridge intermediate the firstnamed bridges and over which the treble strings pass and engage ataliquot parts of their length, and pedal mechanism for moving theauxiliary bridge in and out of contact with the treble strings.

3. In a piano, a string plate, strings car-- ried by the said plate, thetreble strings each being of a length which is a multiple of the lengthof an ordinary string, bridges over which the strings are stretched, abearing name to this specification in the presence of on the plateintermediate of the said bridges, two subscribing witnesses.

an auxiliary bridge slidably mounted in the bearing below the strings,and a pedal mechanism for moving the auxiliary bridge in and out ofContact with the strings.

In testimony whereof 'I have signed my WILHELM G. SCHEINPFLUG.

WVitnesses:

TI-IEO. G. HosTER, PHILIP D. ROLLHAUS.

